baber/WOPTO huggingface dataset:
Patent GB-916475-A (GB)
Title: Improvements in or relating to electrical circuits employing semi-conductor devices
IPC: H03K19/10
Filed: 1960-07-21
Abstract: 916,475. Tunnel-diode switching circuits. INTERNATIONAL BUSINESS MACHINES CORPORATION. July 21, 1960 [Aug. 25, 1959], No. 25408/60. Class 40 (6). A regenerative switching circuit comprises a tunnel diode and a resistor connected in series in the emitter circuit of a transistor to whose base electrode switching voltages are applied. The transistor is normally weakly conducting so that a comparatively low voltage is developed across the series combination of tunnel diode 1 and load resistor 6 and the diode 1 takes up its low-voltage high-current state. On the application of a pulse to the base of transistor 2 to render it highly conducting, a comparatively large voltage is established across the diode 1 and resistor 6, the diode then switching to its high voltage, low-current state. As a result the current through resistor 6 is reduced and a pulse is developed at output terminal 10 opposite in sign to the input pulse. By connecting a plurality of transistors in parallel, Fig. 4, in place of the single transistor 2, a NOT-OR circuit is produced; an inverted pulse support is delivered when a positive pulse input is applied to render any one of the transistors highly conducting. A NOT-AND circuit may be realized, Fig. 5 (not shown), by using PNP transistors instead of the NPN transistors shown and reversing the polarities of all the supplies and of the tunnel diode ; in this circuit a negative output pulse is obtained only if positive input pulses are applied simultaneously to all the transistors.
Patent GB-742336-A (GB)
Title: D.c. restoring or clamping circuits
IPC: H04N5/16
Filed: 1953-09-15
Abstract: 742,336. Television. RADIO CORPORATION OF AMERICA. Sept. 15, 1953 [Oct. 1, 1952], No. 25481/53. Addition to 742,134, [Group XL (c)]. Class 40 (3). [Also in Group XL (c)] In a circuit of the type described in the parent Specification one electrode 31 of a symmetrical transistor 20, Fig. 1, is connected to a reference potential and another electrode 35 is connected to a point to be clamped. A negative giving pulse applied to the electrode 33 attached to the N-type central region causes bidirectional flow to occur between the two end P-type regions so that the grid 17 is brought to the potential of the tapping on potentiometer 47. The pulse may conveniently be generated by the line time base circuit (Fig. 2, not shown), and the grid may be that of the C.R.T. In a modification (Fig. 3, not shown), a NPN transistor is employed with appropriate biasing arrangements.
Patent GB-1301059-A (GB)
Title: Heater roll temperature detector apparatus
IPC: G01K13/08
Filed: 1971-04-19
Abstract: 1301059 Measuring temperature electrically GENERAL ELECTRIC CO 19 April 1971 [13 May 1970] 25482/71 Heading G1N [Also in Division H1] Apparatus for sensing the temperature of a rotatable cylindrical heater roll 10 comprises a stationary ring 14 provided with a winding 16 of one or more turns of temperature-responsive resistance wire which ring extends into an annular slot 12 in the end face 13 of the roll. The winding is of iron, a nickel alloy containing chromium or platinum and each winding is woundnon-inductively. The winding is said to be connected to a control circuit for an electrical heat source for the roll.
Patent GB-1525380-A (GB)
Title: Rotatable chisel block for a wood working machine
IPC: B27G13/04
Filed: 1977-06-17
Abstract: 1525380 Rotary chisels L KLOOSTER & ZONEN BV 17 June 1977 [26 July 1976] 25486/77 Heading B5L In a wood working machine in which chisel blades 6 are fastened to a rotatable chisel block 1 by bolts 5, loosening of each of the blades is prevented, in the event of the rupture of the associated bolt, by an L-shaped clamping plate 7 provided with a pair of projections 13 and 14 engaging in a recessed groove 2 in the block. Each blade is held in position during tightening of its clamping bolt 5 by a pair of set screws 9, 10 supported at 45 degrees to the groove 2 and engaging a face 11 of the blade.
Patent GB-223936-A (GB)
Title: Improvements in spindles for use in spinning frames and like machinery
IPC: D01H1/244
Filed: 1924-10-27
Abstract: 223,936. M³nz, F. Oct. 27, 1923, [Convention date]. Magnetically relieving pressure.-The armature of the driving electromotors of spinning-spindles is so adjusted that, during working, it is drawn upwards into the magnetic field of the stator and the pressure on the footstep bearing h is relieved. The stator casing i is mounted on the sleeve b of the spindle bearing, which is supported by a spring e and is normally held in position by a spring bolt c. In the case of flyer spindles, the armature may be 'mounted between two bearings.
Patent GB-968411-A (GB)
Title: A method and apparatus for extracting gluten from dough
Inventor: STOKES CHRISTOPHER FREDERICK
IPC: A23J1/12
Filed: 1961-07-14
Abstract: Gluten is extracted from dough formed of dry-milled endosperm of wheat and water by using an apparatus which comprises a container in which are at least two cylindrical rolls, the surfaces whereof are shaped to form a spiral scroll, with each adjacent roll having its spiral pitched in the opposite hand, means for supplying water or wash liquor to the container and means for driving the adjacent rolls in opposite directions with their spiral scrolls in close mesh, so that the dough is squeezed between them and distorted thereby presenting a constantly changing surface to the water or wash liquor. Soluble constituents of the dough are removed by the wash liquor leaving hydrated gluten as a cohesive mass which can be separated by sieving.
Patent GB-1202617-A (GB)
Title: Improvements in or relating to scanning devices for exposing photosensitive surfaces
IPC: G03B27/32
Filed: 1968-05-29
Abstract: 1,202,617. Photographic apparatus. GERBER SCIENTIFIC INSTRUMENT CO. May 29, 1968 [Dec.22, 1967], No.25636/68. Heading G2A. A graphic design is produced by exposing a photo-sensitive surface, e.g. to produce a mask for making circuit boards or integrated circuit elements, the exposure comprising projecting light energy on to a plurality of discrete spots located along a given line, moving the line in successive passes over a photo-sensitive surface, and selectively varying the amount of light energy projected on to each of the spots as the line is moved relative to the photo-sensitive surface. In one embodiment, a cathode ray tube 38 is mounted on an X-Y plotter consisting of stepping motors 22, 34 and lead screws 20, 30, and light is focused by lens system 52 on to photo-sensitive surface 12. The cathode ray tube beam scans over an apertured mask having two rows of apertures, the apertures in one row being staggered with respect to the other row so that during scanning a continuous line may be generated. The beam is switched on or off adjacent each aperture under the control of a computer 54 and associated input device 56 such as a punched paper or magnetic tape reader. The focusing lens may be omitted and the photo-sensitive surface disposed close to the tube faceplate. The cathode ray tube may have a single beam or a multiple beam tube with associated beam switching devices may be used. In further embodiments a bundle of fibre optics is used to conduct a pattern from the faceplate of a cathode ray tube, Fig.10 (not shown), or from a plurality of light sources, Fig.8 (not shown), a lens being used to focus the end of the bundle on to the photo-sensitive surface.
Patent GB-1103292-A (GB)
Title: Apparatus for reading timing indicia from a moving record medium
Inventor: EITEL RONALD JOHN FRANK
IPC: G06K7/016
Filed: 1965-06-17
Abstract: 1,103,292. Counters. ENGLISH ELECTRIC COMPUTERS Ltd. 17 June. 1966 [17 June, 1965], No. 25709/65. Headings G4A and G4D. Passage of sprocket-holes in a tape 11 results in the successive activation of photo-cells A, B, and the successive marking through AND gates 20-23 of leads A<SP>1</SP>B<SP>1</SP>, AB<SP>1</SP>, AB, A<SP>1</SP>B. With flip-flop 28 initially set by a signal from 38, AND gates 24-27 respond to these markings to operate flip-flops 28-31 as a shift register. When any flip-flop turns on feed-back over a delay circuit 32-35 turns off the preceding flip-flop. Tape flutter causing temporary reversal has no effect provided the amplitude is low. Completion of a cycle produces an output fed to a counter at 36.
Patent GB-387744-A (GB)
Title: Improvements in and relating to insulating materials
IPC: H01B3/18
Filed: 1931-09-14
Abstract: An electric insulating-material comprises a mixture of chloronaphthalenes and a small proportion, usually about 1 per cent by weight, of a high molecular organic material, e.g. rubber, balata, guttapercha, polymerized styrol, polymerized fatty oils, cellulose ethers, and other cellulose derivatives which are soluble in oil and natural or artificial resins which are soluble in oil.  The composition may be made by dissolving the high molecular material in the fused chloronaphthalene or the addition, e.g. rubber, may be first dissolved in a volatile solvent, the solution mixed with the fused naphthalene, and the solvent evaporated.  In some cases the addition may be made during the preparation of the chloronaphthalenes by chlorinating naphthalene, or the high molecular compounds can be formed simultaneously with the preparation of the chloronaphthalenes, e.g. when rubber is present during the reaction it reacts with chlorine to form high molecular colloidal rubber.  Reference has been directed by the Comptroller to Specifications 308,701, 309,421, [both in Class 22, Cements &c.], 349,116, 349,981, and 349,982.
Patent GB-745824-A (GB)
Title: Improvements in or relating to welding apparatus
IPC: B23K9/29
Filed: 1952-10-14
Abstract: 745,824. Welding by fusion. GENERAL ELECTRIC CO., Ltd., and DONELAN, J. A. Oct. 5, 1953 [Oct. 14, 1952], No. 25744/52. Class 83 (4). [Also in Group XI] A gas-shielded electric arc welding head has one or more windows providing the operator with a clear view of the arc and weld. Tungsten electrodes 10, 11 adjustably mounted in collet 14 in water-cooled supports 13 are insulated from each other and connected to the respective phase wires of a two-phase current supply having its return wire connected to the work. Argon is passed down a central bore 21 and through a water-cooled nozzle 17 surrounding the electrodes 10, 11 which nozzle may be shaped to fit closely to the work. An optical system consisting of a lens 24 at the top of the central bore 21 and a prism 26 throws an image of the arc and work on to a screen 27. Specifications 691,373 and 722,707 are referred to.
Patent GB-875540-A (GB)
Title: Electric demand indicating apparatus
Inventor: DEACON LIONEL OAKLEY
IPC: G01D11/06
Filed: 1959-07-28
Abstract: 875,540. Indicating-apparatus. CHAMBERLAIN & HOOKHAM Ltd. June 10, 1960 [July 28, 1959], No. 25826/59. Addition to 820,749. Class 106 (4). [Also in Groups XXXIV and XXXVI] A modification of the electric maximum demand meter described and claimed in the parent Specification in which bearing inserts 6, 7 of a resiliency deformable plastic or other resiliently deformable material are mounted in plates 4, 5 to support the ends of the indicator spindle 8. Nylon impregnated with molybdenum disulphide is referred to as a suitable material. The plates may, alternatively, be wholly formed of such material.
Patent GB-502743-A (GB)
Title: Improvements in and relating to cathode ray oscillographs
IPC: G01R13/32
Filed: 1937-09-23
Abstract: 502,743. Oscillographs ; valve circuits. SCOLES, G. J., and METROPOLITANVICKERS ELECTRICAL CO., Ltd. Sept. 23, 1937, No. 25866. [Class 37] [Also in Group XL] A cathode-ray oscillograph and impulse generator for producing and indicating or recording transients has a voltage across the time-sweep condenser applied to a tripping circuit including a discharge tube and series resistor, the discharge tube igniting at an adjustable interval after the termination of the time-sweep and producing a change of potential at the junction of the resistor and tube which is caused to initiate the charging of the impulse generator and also to discharge the time-sweep condenser. The time-sweep circuit 2 has the condenser 8 charged through a resistor 7 on which a tripping circuit 30 .. 32 is tapped at 33 and connected across the circuit 2. A spot-suppressing circuit 10 .. 12 is provided and when the tube 10 ignites, the resistor 11 permits the voltage across condenser 8 to increase at a slower rate. The potential at 33 thus increases until tubes 30, 31 ignite, and the potential produced at the junction point 34 is applied through condenser 35 to the grid of tube 5 to discharge the time-sweep condenser 8. The junction point 34 is also connected through condenser 36 to a gridcontrolled tube 14 to permit charging of the surge condenser 16, the periodical discharge occurring through tube 17 into the network 18. The bias resistor 20 of tube 17 includes a parallel connection 21 .. 23 to which is connected a synchronizing condenser 24. During successive time-sweeps, surges and zero lines are traced alternately upon the screen since, while charging current flows in resistor 15 a negative bias is applied to the grid of tube 17 and the sweep condenser impulse is ineffective to trip, whereas when the surge condenser is charged no current flows in resistor 15 and the sweep condenser impulse is effective. The time elapsing between striking of tubes 10 and 30, 31 is varied for different surge durations by altering the tapping position 33, varying resistor 11, employing a biassing battery in a single-tube tripping circuit or by varying the bias of a grid-controlled tube used in place of the discharge tubes 30, 31. Specifications 482,956; 482,957, [Group XXXV], and 482,994 are referred to.
Patent GB-988318-A (GB)
Title: Frangible fairings for rocket launchers
IPC: F41F3/065
Filed: 1963-06-28
Abstract: 988,318. Discharging rockets from aircraft. HOWLEY PRODUCTS CO. June 28, 1963 [July 27, 1962], No. 25871/63. Heading F3C. [Also in Division B7] A rocket launcher mounted beneath the wing of an aircraft comprises a body 22 having a rose fairing 20 and a tail fairing 21 attached thereto by clamps 23 and 24. The fairings are constructed to be frangible under the impact of the rocket and its exhaust gases, the construction being such that the fragments of the fairing will be sufficiently small as to cause no damage to the aircraft. In Fig. 1 the nose fairing has a smooth exterior surface 2 and an interior surface of moulded ridges 3, 4 forming areas 5 approximately 2 inches square. In the arrangement of Fig. 3 the fairing wall is constructed with alternate areas of uniform thickness and varying thickness formed by steps 10, as shown by areas 8 and 9 respectively. To assist fragmentation area a of Fig. 1 is impregnated with phenolic resin to render it brittle, whereas the fibres of area b are impregnated in polystrene solution to render the area less brittle than area a. Suitable theremosetting resins are described.
Patent GB-813241-A (GB)
Title: Improvements in or relating to valves for the control of grain and like pulverulent materials fed from a hopper
IPC: B65G65/44
Filed: 1954-09-07
Abstract: 813,241. Discharging a hopper. RANSOMES SIMS & JEFFERIES Ltd., and JARVIS, J. S. Nov. 30, 1955 [Sept. 7, 1954], No. 25922/54. Class 78 (1). A discharge valve for discharging grain from the hopper 2 of a grain varier comprises an oscillatory lever 14 which rocks a vane 13 about pivot 11, the angle of oscillation of the lever being adjustable at 19 to vary the rate at which grain is discharged from the hopper by the said vane. As shown, when the vane is at rest, the discharge slot 5 is self-blocking, the grain resting on trough 8. When the vane is rocked by connecting rod 15 the grain is discharged over the sides of the trough, the rate of discharge being governed by the length of lever 14 adjusted by nut-and-screw means 16-21 operated by thumbscrew 19. Alternatively, the adjustment may be made to the throw of the crank by nut- and-screw means 41-46 (not shown).
Patent GB-883746-A (GB)
Title: Purification of phenol
IPC: C07C39/04
Filed: 1960-07-27
Abstract: Phenol derived from cumene hydroperoxide is purified by contacting the phenol, containing colour-forming impurities, including benzofuran precursors, in the liquid phase with a sufficient quantity of a base to adjust the pH of the mixture to a value not less than 6.0 at an elevated temperature for at least 15 minutes to effect conversion of the benzofuran precursors into products separable from the phenol, fractionally steamdistilling the phenol before, during, or after treatment with the base to remove benzofurans and subjecting the phenol to fractional distillation to recover a purified phenol. The process is described in examples, the bases used being sodium and potassium hydroxides, octadecylamine and octadecylamine acetate, propylenediamine disalicylate and ammonia.
Patent GB-344368-A (GB)
IPC: F23D14/48
Filed: 1929-08-28
Abstract: 344,368. Atmospheric gas or vapour, spray, and pulverulent fuel burners. GUHL, H., 5, Richard-Wagnerstrasse, Karlsruhe, Baden, Germany. Aug. 28, 1929, No. 26214. Convention date, Dec. 27, 1928. Void [Published under Sect. 91 of the Acts]. [Class 75 (i).] A gas regulator for atmospheric burners comprises inner and outer nozzles 1, 2 having outlets 3, 5 adapted to pass the minimum and maximum quantity of gas respectively, the outlet 3 being connected by two small struts 4 to the cylindrical portion of the nozzle 1 and the nozzles 1, 2 relatively adjustable so that the passage between the outlets 3, 5 can be opened or closed as desired. Adjustment of the nozzle 2 simultaneously regulates the air supply to the mixing tube. The inner nozzle may be adapted to set the gas in vibration as described in Specification 283,568, [Class 75 (i), Burners &c.]. A third adjustable nozzle 7 having a lateral inlet for gas, carbon dust or liquid may be provided. The inner nozzle may be replaced by a needle valve, drilled longitudinally and ground flat on opposite sides adjacent the point. It is stated in the Specification that a plurality of inter-penetrating nozzles may be used for mixing air with gas, vapour, liquids or carbon dust.
Patent GB-705765-A (GB)
Title: Cooling equipment for air-cooled multicylinder internal-combustion engines
IPC: F01P5/06
Filed: 1951-11-09
Abstract: 705,765. Dynamo-electric machines. TATRA NATIONAL CORPORATION, and MACKERLE, J. Nov. 9, 1951 [Nov. 24, 1950], No. 26281/51. Class 35. [Also in Group XXVII] In an air-cooled engine with an axial cooling fan 2, 5, there is provided a conduit 6 for the cooling air, the intake part of which conduit is disposed laterally of the engine within the axial range of the crank case, the fan, comprising an impeller 5 and a guide blade ring 2, being arranged within the mouth of the conduit, and the engine dynamo 1 being built into the hub of ring 2 whilst the wheel 5 is carried by the inner end of the dynamo shaft, the outer end of which is driven from the crank shaft through a belt 10, for example. The dynamo 1 is mounted in the hub by a tapered annular insert 3 that is tightened by a nut 4. The above arrangement also provides both efficient cooling of the dynamo since air is drawn by the impeller 5 through openings 8 in the dynamo case, and enables the dynamo brushes to be readily inspected.
Patent GB-747744-A (GB)
Title: Process for the preparation of 3-acetyl-4-hydroxycoumarin
Inventor: LACEY RICHARD NORMAN
IPC: C07D311/46
Filed: 1953-09-25
Abstract: 3 - Acetyl - 4 - hydroxycoumarin is prepared by interacting acetylsalicyl chloride with the calcium derivative of the acetoacetic ester of a lower primary or secondary alkanol containing up to 6 carbons in the ester group, cyclizing the product with aqueous alkali metal hydroxide solution and liberating the coumarin from its alkali metal salt by acidification.  In examples: (1) acetylsalicyl chloride is added slowly to a refluxing benzene solution of the calcium derivative of isopropyl acetoacetate (prepared by refluxing isopropyl acetoacetate in benzene with excess calcium oxide), the product treated with water to remove calcium chloride, the organic layer separated and benzene distilled off. The residue is treated with aqueous-methanolic sodium hydroxide, and then 3-acetyl-4-hydroxycoumarin precipitated with hydrochloric acid. (2) As in (1), using the calcium derivative of n-butyl acetoacetate. Other examples employ carbon tetrachloride as solvent, and also crude acetylsalicyl chloride which contains aluminium chloride as impurity. n-Butyl acetoacetate is prepared by reacting n-butanol with diketene in the presence of a trimethylamine catalyst.  Specification 745,853 is referred to.
Patent GB-601893-A (GB)
Title: Improvements in or relating to navigation instruments
IPC: G01C21/20
Filed: 1945-10-10
Abstract: 601,893. Course - recording apparatus. REILLY, H. L., and SEYMOUR, K. Oct. 10, 1945, No. 26456. [Class 97 (ii)] Relates to course-recording apparatus in which the N-S and E-W mileages are modified before being transmitted to the tracer in order to compensate for distortion of the scale of a map according to Mercator's projection at latitudes other than the true to scale latitude. A lever 30, moved in accordance with true distance N or S is coupled, e.g. by a pin 45 and slots 36, 37, to a lever 31 and the pin 45 is constrained to move along a predetermined path, e.g. the straight track 43 intersecting the line joining the fulcrums 32, 33 of the levers 30, 31 respectively at an angle other than 90 degrees, so that the lever 31 is given a movement proportional to the change in the latitude in the relation of projected to true distance. The N-S and E-W mileages are transmitted from a ground position indicator (not shown), through friction couplings 3, 4, to differential gears 7, 8 and through gears 28, 29 to the driving discs 9, 10 of continuously variable friction gears. The N-S mileage is also transmitted, through a gear 40 for reversing the motion when the instrument is used in the southern hemisphere, to a worm 38 driving a quadrant 34 to which the lever 30 is frictionally attached. The driven rollers 11, 12 of the friction gears are carried by frame 13 and are adjusted relatively to the driving discs 9, 10 by the engagement of a toothed quadrant 35 on the lever 31 with a rack 42 on the frame 13. Rotation of the rollers 11, 12 is transmitted through gears 56, 57 to the differential gears 7, 8, the output from which corresponds to N-S and E-W mileages corrected for map distortion and is used to drive a tracer over the map by means of two traverser rods intersecting at right angles. Multi-speed gear boxes 54, 55 are provided to adapt the instrument to maps of different scale. Handles 50, 51 enable the tracer to be set to the initial position of the craft. When the tracer is at the true to scale latitude on the map the pin 45 is arranged' to be in line with the fulcrums 32, 33, the rollers 11, 12, to be at the centres of the discs 9, 10, and a pointer 48 on lever 30 to indicate zero on a scale of N-S mileage 49. The guide 43 is displaced parallel to itself according to the latitude of the true to scale part of the map by operation of the handle 47a, the pin 45 being retained in coincidence with the fulcrum 32 when this latitude is the equator.
Patent GB-1201084-A (GB)
Title: Improvements in or relating to distributors for gaseous medium
Inventor: THIRD ALEXANDER DAVIDSON
IPC: F24F13/06
Filed: 1967-06-08
Abstract: 1,201,084. Ventilating ships. THERMOTANK Ltd. 14 May, 1968 [8 June, 1967], No. 26459/67. Heading F4V. A ventilation system for a ship comprises a plurality of branch ducts leading from a fan duct and each terminating in an air distributer casing 11 having a valve 17 apportioning the air flow between a cabin outlet 13 and an excess air outlet 14 to a ceiling void 15, so that the cabin air flow from one casing 11 is independent of that from the other casings. In another embodiment, the valve 17 is replaced by a flap pivoting between two outlets at right-angles, and the excess air outlet may lead to a passageway.